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VKey Voltage Keypad

VKey Voltage Keypad
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Description: This is the VKey Voltage Keypad, a simple board that adds a keypad to your microcontroller project without using multiple I/O pins. This keypad has 12 pushbutton switches in a 3x4 array. The VKey operates by outputing an analog voltage to encode which key has been pressed, which can be read by an analog to digital converter on a microcontroller on a single input pin.

Traditional digital keypad interfacing techniques can require a large number of digital I/O lines. On a small controller, there may not be many I/O pins left for other tasks. The VKey operates at a voltage of 3.3-5.5V and features a dual opamp which is used as a current source and buffer amplifier.


SKU PRT-12080
Stock Out of Stock
Ships No Date Available.
Weight 2.55 oz
Price: $14.95
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Serial Cable DB9 M/F - 6 Foot
Basic 16x2 Character LCD - Black on Green 5V
DIP Sockets Solder Tail - 8-Pin
Laser Module Mount
Motor Driver 15A IRF7862PBF
Jumper Wire - JST 4-Pin
LED - Assorted (26 pack)
Jumper Wire - 0.1", 6-pin, 6"
Speaker - PCB Mount
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